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Old 04-July-2009, 04:49 PM
Jeff Root Jeff Root is offline
Order of Kilopi
 
Join Date: Dec 2004
Location: Minneapolis
Posts: 6,182
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It is clear to me that the number 'one' is a prime number (since it is
not the product of other integers), but for convenience in certain cases
in number theory, an ad hoc addition was made to the definition to
specify that it is 'not a prime'. By nature, it is prime. By definition,
it is not prime.

-- Jeff, in Minneapolis
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